检查行管已击穿,同时R529有明显的烧焦痕迹,查V553枕校管也已击穿,测主电源电压正常,换上新行管.V553和R529后开机,R529立即冒烟,马上关机,怀疑行偏转线圈回路有问题,查S校正电容C425正常,将机芯板拆下,更换R529后装到另一象管上,开机一切正常,说明确实是偏转线圈内部有短路,更换偏转线圈后故障排除. |
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